Shallow-water Rissoidae of the genera Alvania Risso 1826 Haurakia Iredale 1915 Parashiela Laseron 1956 Simulamerelina Ponder 1985 and Subestea Cotton 1944 Gastropoda Caenogastropoda Rissooidea from French Polynesia with the description of a new deep-water genus Author Amati, Bruno Largo Giuseppe Veratti, 37 / D, I- 00146 Roma (Italy) bruno _ amati @ yahoo. it amati@yahoo.it Author Giulio, Andrea Di Dipartimento di Scienze, LIME Lab, Università “ Roma Tre ”, Viale Marconi, 446, I- 00146 Roma (Italy) and NBFC, National Biodiversity Future Center, Palermo I- 90133 (Italy) andrea. digiulio @ uniroma 3. it Author Oliverio, Marco Dipartimento di Biologia e Biotecnologie ‘ Charles Darwin’, Sapienza Università di Roma, Viale dell’Università 32, I- 00185 Roma (Italy) marco. oliverio @ uniroma 1. it text Zoosystema 2023 2023-12-22 45 25 803 892 https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/zoosystema2023v45a25.pdf journal article 283961 10.5252/zoosystema2023v45a25 6247b5e8-e434-4ff4-a408-d8ee87c09da7 1638-9387 10458066 054D312B-C54B-459D-8A47-AC9CB681D7D4

TABLE 5. — Measurements of teleoconch and protoconch of Polynesian species of Parashiela Laseron, 1956, in mm, with minimum-maximum range and mean [standard deviation in square parentheses]; sample size in parentheses after the species name; M, protoconch multispiral; P, protoconch paucispiral.

	Haurakia marmorata Iredale, 1915 (10)	Parashiela ambulata Laseron. 1956 (10)	Parashiela expansilabrum n. sp. (10)	Parashiela obesula n. sp. (3)	Parashiela rimatara n. sp. (3)	Parashiela rotundata n. sp. (10)	Parashiela soniae n. sp. (10)
Teleoconch
Height	1.80-2.25	1.33-1.72	1.12-1.55	1.07- 1.32	1.38-1.53	0.81-1.17	0.93-1.17
	1.96	1.58	1.35	1.21	1.44	1.03	1.06
	[0.150]	[0.143]	[0.162]	[0.127]	[0.081]	[0.103]	[0.082]
Width	1.02-1.25	0.83-1.05	0.80-1.09	0.75-0.88	0.90-1.00	0.64-0.80	0.65-0.73
	1.13	0.95	0.94	0.84	0.94	0.73	0.69
	[0.078]	[0.083]	[0.087]	[0.075]	[0.053]	[0.050]	[0.031]
Height/Width ratio	1.65-1.81	1.60-1.82	1.33-1.47	1.40-1.50	1.52-1.53	1.27-1.47	1.43-1.60
	1.73	1.68	1.43	1.44	1.53	1.42	1.54
	[0.0503]	[0.0573]	[0.0622]	[0.0526]	[0.0057]	[0.0582]	[0.0566]
Aperture height	0.72-0.95	0.52-0.63	0.51-0.67	0.45-0.58	0.53-0.65	0.40-0.52	0.43-0.50
	0.81	0.59	0.59	0.53	0.59	0.46	0.46
	[0.075]	[0.044]	[0.056]	[0.072]	[0.060]	[0.038]	[0.026]
Height/aperture height ratio	2.34-2.71	2.58-2.93	2.11-2.42	2.16-2.38	2.35-2.60	2.03-2.34	2.16-2.37
	2.43	2.68	2.27	2.27	2.45	2.22	2.29
	[0.1126]	[0.1123]	[0.1156	[0.1101]	[0.1305]	[0.0871]	[0.07197]
No. whorls	3.15-3.8	3.15-3.90	2.60-3.25	2.90-3.15	3.45-3.60	2.00-2.80	2.20-2.75
	3.48	3.53	3.03	2.98	3.52	2.59	2.52
	[0.259]	[0.275]	[0.246]	[0.144]	[0.076]	[0.228]	[0.172]
No. axial ribs on last whorls	–	19-25	18 - 24	37-41	26-54	26-34	12-15
		22	20.6	38.7	36	28.4	13.7
		[2.2]	[1.65]	[2.08]	[15.6]	[2.77]	[0.95]
No. spiral cords on last whorls	–	1	1	1	1	no	no
		1	1	1	1	no	no
		[0]	[0]	[0]	[0]	[-]	[-]
Protoconch
Height	0.212-0.255	0.212-0.260	0.180-0.212	0.175-0.200	0.175-0.185	0.162-0.187	0.225-0.250
	0.236	0.234	0.194	0.192	0.18	0.173	0.234
	[0.0142]	[0.0152]	[0.0115]	[0.0144]	[0.005]	[0.0110]	[0.0078]
Diameter of nucleus	0.050-0.070	0.067-0.087	0.062-0.100	0.063-0.087	0.062-0.075	0.062-0.075	0.075-0.100
	0.060	0.074	0.072	0.075	0.066	0.068	0.095
	[0.0058]	[0.0055]	[0.0111]	[0.0120]	[0.0075]	[0.0058]	[0.0088]
Diameter of first half whorl	0.100-0.150	0.100-0.160	0.125-0.162	0.137-0.150	0.125-0.150	0.125-0.150	0.175-0.195
	0.120	0.142	0.146	0.141	0.137	0.138	0.182
	[0.0144]	[0.0182]	[0.0114]	[0.0075]	[0.0125]	[0.0099]	[0.0076]
Maximum diameter	0.275-0.300	0.237-0.280	0.225-0.275	0.225-0.250	0237-0.250	0.237-0.262	0.237-0.275
	0.282	0.262	0.251	0.237	0.246	0.251	0.254
	[0.0090]	[0.0154]	[0.0199]	[0.0125]	[0.0075]	[0.0070]	[0.0103]
No. of whorls	1.80-2.10	1.30-1.80	1.20-1.40	1.35-1.40	1.35-1.40	1.30-1.40	1.10-1.20
	1.93	1.56	1.36	1.37	1.38	1.35	1.12
	[0.094]	[0.172]	[0.066]	[0.029]	[0.029]	[0.037]	[0.035]
Type	M	M	M	M	M	M	P